package com.luanqibazao;

class BirthDate {
    private int day;
    private int month;
    private int year;

    public BirthDate(int d,int m,int y){
        day=d;month=m;year=y;
    }
    public void setMonth(int m){
        month=m;
    }
    public void setYear(int y){
        year=y;
    }
    public int grtDay(){
        return day;
    }
    public int getMonth(){
        return month;
    }
    public int getYear(){
        return year;
    }
    public void display(){
        System.out.println(day+"-"+month+"-"+year);
    }
}
public class Test{
    public static void main(String args[]){
        Test test=new Test();
        int date=9;
        BirthDate d1=new BirthDate(7,7,1970);
        BirthDate d2=new BirthDate(1,1,2000);
        test.change1(date);
        test.change2(d1);
        test.change3(d2);
        System.out.println("date="+date);
        d1.display();
        d2.display();
    }
    public void change1(int i){
        i=1234;
    }
    public void change2(BirthDate b){
        b=new BirthDate(22,2,2004);
    }
    public void change3(BirthDate b){
        .setDay(22);
    }
}
